Vacuum cleaner



FIG. 1 is a front isometric view of a vacuum cleaner showing the claimed design.

FIG. 2 is a rear isometric view of the vacuum cleaner of FIG. 1.

FIG. 3 is a front elevation view of the vacuum cleaner of FIG. 1.

FIG. 4 is a rear elevation view of the vacuum cleaner of FIG. 1.

FIG. 5 is a left side elevation view of the vacuum cleaner of FIG. 1.

FIG. 6 is a right side elevation view of the vacuum cleaner of FIG. 1; and,

FIG. 7 is a top plan view of the vacuum cleaner of FIG. 1. 

The ornamental design for a vacuum cleaner, as shown and described. 